A US woman who shot and killed her husband and two adult children before taking her own life is thought to have committed the shocking crime as a result of being ostracised from the religion she was raised in.

Every time I tell a mate I’m doing a story on cryptocurrency, they invariably ask me the same two questions: should they invest their own hard-earned money, and which cryptocurrency will get them a Lamborghini/yacht/island quickest?

"Ramping definitely has been a significant problem. It's going to take us some time to turn that around, but we're absolutely committed to doing so," Ms Hennessy said.

Opposition Leader Matthew Guy agreed ambulance ramping had been a problem since the late 1990s.

He said it was time a new Ambulance Victoria board was appointed because without professional intelligence from those on the front line, the government would be unable to identify problems or how to fix them.

"Rather than just another government throwing money they don't have on a problem they don't know ... they need to get a board in, get some answers and provide some solutions," he told reporters.

The entire Ambulance Victoria board resigned last year when Premier Daniel Andrews promised to sack them if they did not step down.

Ms Hennessy said the recruitment process had started.

Ambulance Victoria said strategies are being implemented to manage and improve transfer times, including ambulance arrival boards in key hospitals to help emergency staff track ambulance patients on the way to hospital.